Ventilator



Mag/'4, 1937. .1. H. McDERMENT 2,079,576

VENTILATOR Filed May 18, 1956 5 Sheets-Sheet 1 INVENTOR. 7c zer'merr/ ATTORNEY.

May 4, 1937.

J. H. M DERMENT VENTILATOR Filed May 18, 1956 5 Sheets-Sheet 2 l lul l hul lm lnl l huvlllllll INVENTOR. j mefirnren w M ATTORNEY.

May 4, 1937. J. H. MCDERMENT VENTILATOR Filed May 18, 1936 5 Sheets-Sheet 5 INVENTOR.

WtflCV/Msn/ BY /M Mum/M ATTORNEY.

May 4, 1937. J. H. MCDERMENT VENTILATOR Filed May 18, 1936 5 Sheets-Sheet 4 s MmW R NM INVENTOR.

BY MNe/MM/M ATTORNEY.

J. H. M DERMENT VENTILATO R Filed May 18, 1936 5 Sheets-Sheet s m lllll Ill lllllrlLl. Ill:

hr till INVENTOR.

ATTORNEY.

May 4, 1937.

Lllllllllllllllll Patented May 4, 1937 V UNITED STATES PATENT OFFICE VENTILATOR James H. McDerment, Cleveland, Ohio, assignor to The Swartwout Company, Cleveland, Ohio, a corporation of Ohio Application May 18, 1936, Serial No. 80,248

8 Claims. (01. 98-42) This invention relates to a ventilator construcgram guide means. Thus, the damper may be of tion and has for its principal object to provide a any desired length. In view of the stresses on superior construction for a device of this type and. the elements 25, which are transmitted to the one which, while being relatively inexpensive, will damper itself and the desirability of constructing be highly satisfactory in use and convenient of the damper of thin sheet metal, I prefer to make 5 operation. the elements 25 relatively wide so as to avoid With the foregoing and other objects in view kinking of the damper at the points of connecwhich will be in part apparent and in part pointtion of these elements thereto. ed out hereinafter, the invention consists in all Mounted for sliding motion on the transverse 10 the novel features of construction and arrangestrips 12 is a reciprocating element comprising 10 ment of parts hereinafter described and illusspaced longitudinally extending angle members trated in the accompanying drawings wherein Fig. 26 and transversely extending connecting mem- 1 is a transverse section taken through a ridge bers 27 connected at their ends to the members ventilator embodying the invention; Figs. 2 and 26 whereby to brace the latter. Pivotally con- 2a. taken together makeup a central longitudinal nected to the members 26 and to members 28 15 section therethrough; Figs. 3 and 3a taken towhich are secured to the damper immediately gether make up a horizontal section correspondunderneath the members 25 are a plurality of ing substantially to the line 3-3 of Fig. 1; and toggle members 29 each of which comprises a Fig. 4 is a detail fragmentary section taken. frame work consisting of a pair of links connectthrough a portion of the screw threaded operated together and braced by transverse angle ele- 20 ing means. ments 30.

In the drawings, the numeral N indicates a Attached to two of the elements 21, as will be portion of the building defining a ventilating clear from Figs. 2 and 3, I provide a connecting opening. Attached to the elements [0 in any bar 3| to which I secure a threaded element 32.

2 suitable manner and extending upwardly and to- Journaled in a suitable bearing 33, carried by ward each other are plates l l which are connected one of the strips l2, by a sleeve 34 is a cooperating by spaced transverse strips I2 and bows'l3. The threaded element or nut 35 which is in turn bows l3 haveportions l4 extending along the eleconnected to a tubular member 36, the rotation ments II and terminating at their lower ends in f w ich, it w l b b imparts u al hooks it? which are adapted to receive struck-out motion to the element 32. The tubular element 30 portions 16 of the baflie elements II. The bows 36 i journaled at its l f h nd d s Seen in I3 are provided at their upper corners with fiat- Fig. 2 in a suitable bearing 31 carried by one of tened portions I8 to which are secured a ridge the strips 12. The tube 36 has non-rotatably seroll l9 and suitable bracing elements 20 and 2| cured thereto a sprocket wheel 38 on which is rewhich extend outwardly and position the upper ceived an operating chain 39 which extends 35 edges of the baffles IT. The upper edges of the downwardly to a position readily accessible to element II project above the strips l2 and dean operator. fine an opening to be closed. A damper 22 is It will be obvious that the damper is moved adapted to close the opening defined by the upper upwardly from closed position by motion of the 40 edges of the element II and to be moved toward elements 26 to the left and that it will tend 40 and from the same by the mechanism about to at all times to return under the action of gravbe described. ity to closed position. However, the threaded Secured to the bows 13 are brackets 23 to the element 32 is provided with threads of such lower edges of which and the adjacent portions pitch that the action of gravity on the damper 46 of the bows l3 are pivoted guide links 24. These will not serve to rotate the element 35. Thus, 5 links are pivoted at their lower ends to straps 25 the damper will remain in any position at which which extend across and brace the damper 22. it is set by the operator and without the neces- As will be obvious from the drawings, these guide sity of any latching means. links are placed opposite each other, one pair This construction is adaptable to buildings of 50 to each of the supporting bows l3 and a plurality any length and may be constructed in sections, 50 of pairs of such links are provided along the if desired. For example, the portion shown in length of the damper. Each pair of guide links, Fig. 2 may be considered as an operating secpivoted to their supports and the damper in a tion and the portions shown in Fig. 2a may be manner to be movable while always remaining considered as supplemental sections and while parallel to each other, may be termed a parallelothey have been shown as of integral construction, 55

it is to be understood that the damper may be made in sections which will not be connected together and that it is only necessary to provide a connecting means for those portions of the elements 26 making up the reciprocable actuator for each section. It is of course necessary that the section shown in Fig. 2, if made separable, would have to be provided with a second pair of guide links 24 and a second actuating portion 29 mounted in the same manner as each of the two half units shown in Fig. 211.

From the foregoing, it will be obvious that I- have provided a device which is well adapted for its intended purpose and while I have shown and described the preferred embodiment, I wish it understood that my invention may be realized in varying constructions and that I am limited only in accordance with the appended claims and the prior art.

Having thus described my invention, what I claim is:

1. In a ventilator, in combination with means defining an opening to be closed, a damper, and means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating said toggle link means and remote control means for operating said screw means.

2. In a ventilator, in combination with means defining an opening to be closed, a damper, and

' means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating said toggle link means and remote control means for operating said screw means, said reciprocable element comprising spaced bars having transversely extending bracing barsconnecting such spaced bars and said screw means being connected to a plurality of said bracing bars centrally thereof.

3. In a ventilator, in combination with means defining an opening to be closed, a damper, and means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating said toggle link means and remote control means for operating said screw means, said reciprocableelement comprising spaced bars and said toggle link means comprising similarly spaced links and provided with transversely extending bracing elements connecting them together.

.4. In a ventilator, in combination with means defining an opening to be closed, a damper, and

means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating. said toggle link means and remote control means for operating said screw means, said reciprocable element comprising spaced bars having transversely extending bracing bars connecting such spaced bars and said screw means being connected to a plurality of said bracing bars centrally thereof and said toggle link means comprising similarly spaced links and provided with transversely extending bracing elements connecting them together.

5. In a ventilator, in combination with means defining an opening to be closed,=a-damper, and means for controlling the motion thereof, said last means comprising a parallelogram guide 7 means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper toand from closed position, screw means for operating said toggle link means and remote control means for operating said screw means, said remote control means including a sprocket carried by said screw means and fixed to a rotatable element thereof and a flexible element carried by said sprocket and extending downwardly to a position accessible to an operator.

6. In a ventilator, in combination with means defining an opening to be closed, a damper, and

.means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating said toggle link means and remote control means for operating said screw means, said reciprocable element comprising spaced bars having transversely extending bracing bars connecting such spaced bars and said screw means being connected to a plurality of saidbracing bars centrally thereof, said remote control means including a sprocket carried by said screw means and fixed to a rotatable element thereof and a flexible element carried by said sprocket and extending downwardly to a position accessible to an operator.

'7. In a ventilator, in combination with means defining an opening to be closed, a damper, and means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating said toggle link .means and remote control means for operating said screw means, said reciprocable element comprising spaced bars and said toggle link means comprising similarly spaced links and provided with transversely extending bracing elements connecting them together, said remote control means including a sprocket carried by said screw means and fixed to a rotatable element thereof and a flexible element carried by said sprocket and extending downwardly to a position accessible to an operator.

8. In a ventilator, in combination with means defining an opening to be closed, a damper, and means for controlling the motion thereof, said last means comprising a parallelogram guide means, a reciprocable element movably mounted for motion longitudinally of said damper, toggle link means actuated by sliding motion of said reciprocable element for moving said damper to and from closed position, screw means for operating said toggle link means and, remote con auras-re 3 necting them together, said remote control means including a. sprocket carried by said screw means and fixed to a rotatable element thereof and a flexible element carried by said sprocket and extending downwardly to a position accessible to 5 an operator.

JAMES H. McDERMENT. 

